Especificaciones de los Synology DS108j y DS109 en paralelo, de las fichas técnicas oficiales. Las diferencias están resaltadas.
| DS108j | DS109 | |
| CPU | — | 1.2 GHz |
| Núcleos / hilos | — | 1 core / 1 thread |
| RAM (base) | — | 128 MB |
| RAM (máx.) | — | — |
| Bahías | 1 | 1 |
| Ampliable a | 0 | 0 |
| Ranuras M.2 | 0 | 0 |
| Red | 1GbE | 1× Gigabit Ethernet |
| 10GbE | no | no |
| Capacidad bruta máx. | 1 SATA drive | 2 TB |
| Intercambio en caliente | no | no |
| Formato | Desktop | Desktop |
| Lanzamiento | 2008 | 2009 |
| Consumo | 27 W / 10 W | 19 W / 9 W |
| DSM de lanzamiento | — | 2.2 |
Choose the DS109 if you want a clearly faster, more capable box: it has a 1-bay design too, but with a stronger CPU and more RAM headroom than the DS108J. Neither model offers 10GbE, M.2, or any bay expansion, so the real decision is simply older/lower-end DS108J versus the better-performing DS109 for basic home/SMB file storage.